<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>


<form action="index.html">
    用户名: <label>
    <input name="username" type="text">
</label>
    <input type="submit" value="登录">
</form>


<script>


</script>
</body>
</html>
